Will this change be included in WP 5.0?

Shouldn't this be covered by #11730?

see #11523

@youknowriad @swissspidy it's little different because suppress_filters it's not a Gutenberg block attribute by default

It is different, but you can achieve the same use-cases, maybe it's a bit more difficult in some cases and a bit easier in others.

@youknowriad I can filter $attributes array with 'render_block' filter but there no way to pass suppress_filters to wp_get_recent_posts there

Can't you just regenerate the HTML output of the block the way you want?

That sounds a bit hacky though, especially since the block HTML output could change.

Why does the block even use wp_get_recent_posts? A regular WP_Query would have been just fine. This way one doesn't have to work around suppress_filters limitations.

I was wondering the same @swissspidy

I never saw a report from users complaining that the results of wp_get_recent_posts weren't filtered (WPML filters all queries when they deal with translatable post types), which makes me wonder how many themes use this function.

Anyway, if it should use wp_get_recent_posts, wouldn't make more sense to have a filter inside this function, instead of render_block_core_latest_posts?

added https://core.trac.wordpress.org/ticket/45349 for adding filter inside wp_get_recent_posts instead

I think it duplicates efforts started in #11730 which tries to be more generic. There is also a similar proposal which tries to modify a single attribute for Reusable block block: #8912.

@youknowriad @gziolo is it ok if I modify pull request and replace wp_get_recent_posts on regular WP_Query like @swissspidy proposed?

Probably easier to do that in a separate PR as it's a totally different approach.

I'm closing this one in favor of #11730, which tries to do the same but for all blocks. This is example from the mentioned PR:

add_filter( 'block_prepared_attributes', 'block_attributes_filter', 1, 10 );
function block_attributes_filter( $attributes, $block_type ) {
    if ( $block_type->name === 'my-plugin/my-block' &&  isset( $attributes['data'] ) ) {
            $original_post_id = apply_filters( 'wpml_object_id', get_the_ID(), get_post_type(), true, apply_filters( 'wpml_default_language', null) );
            foreach ( $attributes['data'] as $name => $value ) {
                $string_name = WPML_Gutenberg_Strings_In_Block::get_string_id($attributes['name'], $value);
                $translated = apply_filters( 'wpml_translate_string',
                    $value,
                    $string_name,
                    array('kind' => 'Gutenberg', 'name' => $original_post_id) );
                $attributes['data'][$name] = $translated;
            }
        }

        return $attributes;
}